Depends on what you want out of the car. I like the HKS Hyper that I have for my 32 a lot. If you want the lightest, there are several titanium systems that cost a lot, but are extremely lightweight. Mines, Top Secret, there are tons of makers out there.
If you are just going for a bit louder system, with some performance gains, then just about any of them will do. Personally I am looking into swapping out my HKS system for a titanium for the weight savings. My car is on a diet an I am looking to lose as many pounds as possible.